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3 years ago

What is the value of z in the equation 2z + 8 = −6? −1 −7 1 7

Mathematics

1 answer:

vitfil [10]3 years ago

4 0

Answer:

So the answer is -7

Step-by-step explanation:

2z + 8 = −6

2z + 8 -8 = -6 -8 ( add - 8 for both sides)

2z = -14

2z/2 = -14/2 (divide both sides by 2)

z = - 7

So the answer is -7

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23 ones x 2 tens= answer

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53

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I need 7714 solar panels to power my new workshop . If each box contains 24 panels ,about how many boxes should I purchase.

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2 years ago

Solve the equation and graph the solution(s), if possible. 9|4p + 2| + 8 = 35

Cerrena [4.2K]

Solving an equation means finding a value of a variable that make the equation true. This value is called the solution of the equation. A mathematical equation is just like a balanced equation. Both sides of the equation should be equal at all times. Whatever we do to one side, has to be done on the opposite side.

$9|4p + 2| + 8 = 35$

$
9|4p+2|=35-8
 
$ $Subtract \ 8 \ from \ both \ sides$

$9|4p+2|=27

 
$

$|4p+2|= \dfrac{27}{9}$ $Divide \ both \ sides \ by \ 9$

$|4p+2|=3$

$Break \ down \ the \ problem \ into \ these \ 2 \ equations$

$
4p+2=3
 
$

$-(4p+2)=3$

$Solve \ the \ 1st \ equation: \ 4p+2=3$

$4p=3-2$ $Subtract \ 2 \ from \ both \ sides$

$4p=1$

$p= \dfrac{1}{4}$ $Divide \ both \ sides \ by \ 4$

$Solve \ the \ 2nd \ equation: \ -(4p+2)=3$

$-4p−2=3$ $Simplify \ brackets$

$-4p=3+2$ $Add \ 2 \ to \ both \ sides$

$-4p=5$

$p= -\dfrac{5}{4}$

$Collect \ all \ solutions$

$p= -\dfrac{5}{4}$ , $p= \dfrac{1}{4}$

8 0

2 years ago

Ludmilka [50]

Answer:

Step-by-step explanation:

d = r * t

Let the rate of the boat in still water = x

Let the rate of the stream = y

Against the current

24 = (x - y)* 4 Divide both sides by 4

24/4 = x - y

6 = x - y

With the current

24 = (x + y )* 3 Divide both sides by 3

24/3 = (x + y)

8 = x + y

Put the two equations together

x - y = 6

x + y = 8 Add

2x = 14 Divide by 2

2x/2 = 14/2

x = 7

x + y = 8

7 + y = 8

y = 8 - 7

y = 1

The boat is going 7 miles per hour

The stream is going 1 mile per hour.

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2 years ago

Elimina los signos de agrupacion y resuelve la suma de enteros 4+{+5+[-3+4+(-7+4)+4]+2

Veseljchak [2.6K]

I think that is the right!

6 0

2 years ago